वेदान्त पारिजात सौरभ (भगवद् निम्बार्काचार्य - द्वैताद्वैत वेदान्त ब्रह्मसूत्र भाष्य सटीक)

SŪ. 4. 2. 17.
ADH. 9.] VEDĀNTA-KAUSTUBHA 829
the object, to be known through the Vedānta (viz. the Lord), will
be obtained by means of this path recorded in the Vedānta',—the
knower is favoured by Him. Hence it is established that the departure
of the knower takes place through a special vein.
Here ends the section entitled "His Abode" (8).
Adhikaraṇa 9: The section entitled "Following
the rays". (Sūtra 17)
SŪTRA 17
"FOLLOWING THE RAYS."
Vedānta-pārijāta-saurabha
Having come out through the vein that passes out of the crown
of the head, having then followed the rays of the sun, the knower
goes up, in accordance with the assertion: "Through those very rays"
(Chānd. 8.6.5 ¹).
Vedānta-kaustubha
It has been said that the knower comes out through the vein
that passes out of the crown of the head. Now the problem is being
considered as to whether or not there is a fixed rule that, having come
out through it, he follows the rays of the sun on his way.
The Chāndogya, having stated: "Now, when he departs from this
body, then through those very rays he goes up" (Chānd. 8.6.5),
continues: "Going up through it, he goes to immortality" (Chānd.
8.6.6). From this it is known that having come out of the vein that
passes out of the crown of the head, and having then followed the rays,
the knower goes to the disc of the sun. Here the problem is whether
it is obligatory for a knower to follow the rays of the sun, or optional.
On the suggestion, viz. since one who has come out of the gross body
during night does not follow the rays, it is not obligatory for a knower
to follow the rays—
¹ Ś, R, Bh, Śk, B